EP3543858A1 - Procédé de vérification et de compilation de fichiers de démarrage de système - Google Patents

Procédé de vérification et de compilation de fichiers de démarrage de système Download PDF

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Publication number
EP3543858A1
EP3543858A1 EP17871657.7A EP17871657A EP3543858A1 EP 3543858 A1 EP3543858 A1 EP 3543858A1 EP 17871657 A EP17871657 A EP 17871657A EP 3543858 A1 EP3543858 A1 EP 3543858A1
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EP
European Patent Office
Prior art keywords
data
check
type
check data
file
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EP17871657.7A
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German (de)
English (en)
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EP3543858A4 (fr
EP3543858B1 (fr
Inventor
Xiangjun Liu
Tiejun DENG
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JRD Communication Shenzhen Ltd
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JRD Communication Shenzhen Ltd
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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F11/00—Error detection; Error correction; Monitoring
    • G06F11/36—Preventing errors by testing or debugging software
    • G06F11/3604—Software analysis for verifying properties of programs
    • G06F11/3608—Software analysis for verifying properties of programs using formal methods, e.g. model checking, abstract interpretation
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F11/00—Error detection; Error correction; Monitoring
    • G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
    • G06F11/08—Error detection or correction by redundancy in data representation, e.g. by using checking codes
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F11/00—Error detection; Error correction; Monitoring
    • G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
    • G06F11/08—Error detection or correction by redundancy in data representation, e.g. by using checking codes
    • G06F11/10—Adding special bits or symbols to the coded information, e.g. parity check, casting out 9's or 11's
    • G06F11/1004—Adding special bits or symbols to the coded information, e.g. parity check, casting out 9's or 11's to protect a block of data words, e.g. CRC or checksum
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F11/00—Error detection; Error correction; Monitoring
    • G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
    • G06F11/14—Error detection or correction of the data by redundancy in operation
    • G06F11/1402—Saving, restoring, recovering or retrying
    • G06F11/1415—Saving, restoring, recovering or retrying at system level
    • G06F11/1417—Boot up procedures
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
    • G06F21/50—Monitoring users, programs or devices to maintain the integrity of platforms, e.g. of processors, firmware or operating systems
    • G06F21/57—Certifying or maintaining trusted computer platforms, e.g. secure boots or power-downs, version controls, system software checks, secure updates or assessing vulnerabilities
    • G06F21/575—Secure boot
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
    • G06F21/60—Protecting data
    • G06F21/64—Protecting data integrity, e.g. using checksums, certificates or signatures

Definitions

  • the present disclosure relates to the field of computer technologies, and in particular, to a checking method of a system start-up file and a compiling method of a system start-up file.
  • the current android system In order to prevent the mobile phone firmware from being modified or damaged, the current android system generates a check value by calculating the system firmware file, and attaches the check value to the end of the system firmware file. By reading the system firmware partition when the system starts, the system firmware file and the check value may be obtained for further verification.
  • the length of the system firmware file must be less than the length of the system firmware partition.
  • a large amount of padding data needs to be stored in the system firmware partition. The data may increase the time required for checking system firmware and increase the workload.
  • the technical problem to be solved by the present disclosure is to provide a checking method and a compiling method of a system start-up file, which can reduce the check time of the system start-up file and improve work efficiency.
  • a first aspect of the present disclosure provides a checking system of a system start-up file.
  • the system includes a processor, and a storage coupled to the processor; the storage is configured to store a system firmware file, a mapping table, and instructions executed by the processor.
  • the processor is configured to: acquire the system start-up file and the mapping table from a system firmware partition; read first check data and addressing data associated with the first check data from the mapping table; read segmentation data corresponding to the first check data from the system start-up file according to the addressing data; determine whether the first check data is a first type or a second type; determine whether the segmentation data is a repeated permutation of the first check data if the first check data is the first type, and when the segmentation data is not the repeated permutation of the first check data a security error exists in the system start-up file; and determine whether second check data, acquired through calculating the segmentation data according to a check algorithm, is consistent with the first check data if the first check data is the second type, and when the second check data is inconsistent with the first check data a security error exists in the system start-up file.
  • a second aspect of the present disclosure provides a checking method of a system start-up file.
  • the method includes : acquiring the system start-up file and a mapping table from the system firmware partition; reading first check data and addressing data associated with the first check data from the mapping table; reading segmentation data corresponding to the first check data from the system start-up file, according to the addressing data; determining whether the first check data is a first type or a second type; determining whether the segmentation data is a repeated permutation of the first check data if the first check data is the first type, and when the segmentation data is not the repeated permutation of the first check data a security error exists in the system start-up file; and determine whether second check data, acquired through calculating the segmentation data according to a check algorithm, is consistent with the first check data if the first check data is the second type, and when the second check data is inconsistent with the first check data a security error exists in the system start-up file.
  • the addressing data includes a starting address and a data length correspondi ng to the segmentation data.
  • the mapping table is provided with a data type identifier associated with the first check data, or the first check data of the first type and the first check data of the second type are separately stored in different mapping tables; the block of determining whether the first check data is the first type or the second type includes: determi ni ng whether the fi rst check data is the fi rst type or the second type, accordi ng to the data type identifier or the mapping table from which the first check data is derived.
  • the first check data of the first type and the first check data of the second type are continuously stored separately, and the first check data of the first type is set to be read prior to the first check data of the second type.
  • the check algorithm is a HASH algorithm.
  • a third aspect of the present disclosure provides a compiling method of a system start-up file.
  • the method includes: acquiring the system start-up file; determining whether the system start-up file includes first segmentation data formed by a repeated permutation of bytes or byte combinations; if the first segmentation data exists, associating the bytes or byte combination, regarded as check data, with addressing data of the first segmentation data and storing the check data in a mapping table; determining second segmentation data other than the first segmentation data; associating check data, obtained by the second segmentation data through a check algorithm, with addressing data of the second segmentation data, and storing the check data in the mapping table; and storing the mapping table together with the system start-up file into a preset system firmware partition.
  • the addressing data is a starting address and a data length correspondi ng to the first segmentation data or the second segmentation data.
  • the method further includes: with a data type identifier associated with the check data, separately marking the check data, obtained by the bytes or byte combination, and the check data, obtained through the check algorithm, into a first type and a second type, or separately storing the check data obtained by the bytes or byte combinations and the check data obtained by the check algorithm in different mapping tables.
  • the check data obtained by the bytes or byte combinations and the check data obtained by the check algorithm are continuously stored separately, and the check data obtained by the bytes or byte combinations is configured to be read prior to the check data obtained by the check algorithm.
  • the check algorithm is a HASH algorithm.
  • the present disclosure may have the advantages that reading the first check data of the system start-up file from the mapping table, and classifying the corresponding segmentation data in the system start-up file, during the check process, different types of segmentation data are checked according to different methods, thereby reducing verifying time of system start-up file, further improving work efficiency.
  • first”, “second”, and “third” are used for descriptive purposes only and shall not be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated.
  • features defining “first”, “second”, and “third” may include at least one of the features, either explicitly or implicitly.
  • FIG. 1 is a schematic flow chart illustrating an embodiment of a checking method for a system start-up file according to the present disclosure. It should be noted that the method of the present disclosure is not limited to the sequence of the flow shown in FIG. 1 if substantially the same result is obtained. As shown in FIG. 1 , the method includes the following blocks.
  • the method includes acquiring a system start-up file and a mapping table from a system firmware partition.
  • the above system start-up file i.e., a system firmware file
  • the system firmware usually refers to the operating system.
  • the system firmware is the program code at the lowest level for supporti ng operations of the device. Therefore, before the user uses the terminal product, the system firmware has been written into the hardware system correspondi ng to the terminal product by other tools or software. When the terminal is powered on, the system hardware directly gets driven and invoked through the system firmware, so that the terminal works normally.
  • the mapping table is configured to store data having a mapping relationship, and in a specific implementation, the mapping table is configured to store some data information related to the system firmware file.
  • the method includes reading first check data and addressing data associated with the first check data from the mapping table.
  • the mapping table is configured to store first check data associated with the system firmware file and addressing data associated with the first check data.
  • the addressing data includes a starting address of the data and a data length of the data.
  • the method includes reading segmentation data corresponding to the first check data from the system start-up file, according to the addressing data.
  • the system can read the segmentation data corresponding to the first check data from the system firmware file, according to the addressing data.
  • the method includes determining whether the first check data is a first type or a second type.
  • the data type identifier may also be other forms, which is not limited herein.
  • first check data of the first type and the first check data of the second type may be separately stored in different mapping tables, so as to facilitate system access, and it may be determined whether the first check data is the first type or the second type according to the mapping table from which the first check data is derived.
  • the method includes determi ni ng whether the segmentation data is a repeated permutation of the first check data if the first check data is the first type, and if not a repeated permutation of the first check data a security error exists in the system start-up file.
  • the method includes: if the first check data is the second type, determining whether second check data, acquired through calculating the segmentation data according to a check algorithm, is consistent with the first check data, and if the second check data is inconsistent with the first check data, then a security error exists in the system start-up file.
  • the segmentation data is calculated with the check algorithm to obtain the second check data, and the second check data is compared with the first check data. If the comparison result is that these data are different, it means that the current system firmware has been modified or damaged, and the user is promoted for further processing. If the comparison result is that these data are the same, it means that the segmentation data is not modified or damaged.
  • the above check algorithm may be a HASH algorithm or other public algorithms.
  • the first check data of the fi rst type and the fi rst type of the second type may be continuously stored separately, and the first check data of the first type is configured to be read prior to the first check data of the second type. Since the check time of the segmentation data corresponding to the first check data of the first type is less than the check time of the segmentation data corresponding to the first check data of the second type, when the segmentation data corresponding to the first check data of the first type is modified or damaged, the error prompt can be quickly generated, which greatly reduces the time for system fi rmware verification.
  • the system firmware file is stored in the system firmware partition. Since the length of the system firmware is generally smaller than the length of the system fi rmware partition, in order to keep the length of the system firmware consistent with the length of the system firmware partition during the storage process, a large amount of padding data, mostly hexadecimal, needs to be stored in the system firmware file.
  • the repeated permutation of the bytes or byte combinations inside the system firmware data can be directly regarded as the first check data of the first type and get checked.
  • FIG. 2 is a schematic flow chart illustrating another embodiment of a checking method of a system start-up file according to the present disclosure.
  • the method for checking the system start-up file includes the following blocks.
  • the method includes acquiring a system start-up file and a mapping table from a system firmware partition.
  • the method includes reading a data type identifier, a starting address, a data length, and a first check data from the mapping table.
  • the method includes reading segmentation data corresponding to the fi rst check data from the system start-up file to the buffer, according to the starting address and the data length.
  • the method includes determining a type of the first check data according to the data type identifier.
  • the method includes performing calculation on the segmentation data with a check algorithm to obtain second check data.
  • the method includes determining whether the first check data and the second check data are consistent. If the result is that they are consistent, block S209 is executed, and if the result is that they are inconsistent, block S210 is executed, and the process ends.
  • the method includes determining whether the segmentation data is a repeated permutation of the first check data. If the result is that they are the same, block S209 is executed, and if the result is that they are different, block S210 is executed, and the process ends.
  • the method includes determining whether reading of the mapping is completed or not. If the reading is completed, block S211 is executed, and if the reading is not completed, the process returns to block S203.
  • the method includes prompting that a security error exists in the system start-up file.
  • the system start-up file and the mapping table are acquired from the system firmware partition, and the data type identifier (Type), the first check data (Value), the starting address (Address) and the data length (Length) are read from the mapping table.
  • FIG. 3 is a schematic flow chart of an embodiment of a compiling method of a system start-up file according to the present disclosure.
  • the compiling method includes the following blocks.
  • the method includes acquiring a system start-up file.
  • system start-up file is a system firmware file for installation.
  • the method includes determining whether the system start-up file includes a first segmentation data formed by a repeated permutation of bytes or byte combi nations.
  • the system firmware file contains a large amount of padding data formed by a repeated permutation of in bytes or byte combinations, it can be compared in a single byte, 4 bytes or 8 bytes during compiling process.
  • the data formed by repeated permutation of bytes or byte combinations is regarded as the first segmentation data.
  • the method includes: if the first segmentation data exists, regarding the bytes or byte combination as the check data and associating it with the addressing data of the first segmentation data and storing it in the mappi ng table.
  • the above repeated bytes or byte combi nations are directly used as the first check data, and defined as a first type, get associated with the addressing data of the first segmentation data and stored in the mapping table.
  • the method includes determining second segmentation data other than the first segmentation data.
  • the method includes associating the check data, obtained by the second segmentation data through the check algorithm, with the addressing data of the second segmentation data and storing the data in the mapping table.
  • the check algorithm is a HASH algorithm
  • the HASH value or other check data of the system firmware data is used as the first check data, defined as the second type, and is associated with the addressing data of the second segmentation data to get stored in the mappi ng table.
  • the method includes storing the mapping table together with the system start-up file into a preset system firmware partition.
  • the data type identifier associated with the check data is configured to separately mark the check data, obtained by the bytes or byte combination, and the check data, obtained through the check algorithm, into the first type and the second type, or the check data obtained by the bytes or byte combinations and the check data obtained by the check algorithm are separately stored in different mapping tables.
  • the check data obtained by the bytes or byte combination and the check data obtained by the check algorithm are separately stored continuously, and the check data obtained by the bytes or byte combination is configured to be read prior to the check data obtained by the check algorithm. Since the check time of the first type of segmentation data is less than the check time of the second type of segmentation data, when the padding data in the system firmware file is modified or damaged, the ti me for system firmware check is greatly reduced.
  • FIG. 4 is a schematic flow chart illustrating another embodiment of a compiling method of a system start-up file according to the present disclosure. Taking a single byte as an example, the searching process of the first segmentation data includes the following blocks.
  • the method includes accessing the system firmware file in a single byte, reading the file data d, and starti ng address A of d.
  • the method includes increasing the repeating time Lp by one, and block S409 is further executed.
  • the method includes determining whether Lp is greater than or equal to X. If Lp X, block S406 is executed, and if Lp ⁇ X, block S407 is executed.
  • the method includes determining whether the system start-up file reading is completed. If the reading is not completed, the process returns to block S402. If the file reading is completed, block S412 is executed.
  • the method includes determining whether or not the system start-up file reading is completed. If the reading is not completed, the process returns to block S402. If the file reading is completed, block S410 is executed.
  • the method includes determining whether Lp is greater than or equal to X. If Lp X, block S411 is executed, and if Lp ⁇ X, block S412 is executed.
  • the system may select the same data of multiple bytes according to different platforms, for example, a 32-bit CPU platform can select the same data of 4 bytes, so as to effectively speed up the process by the CPU data width.
  • a 32-bit CPU platform can select the same data of 4 bytes, so as to effectively speed up the process by the CPU data width.
  • the same data with 8 bytes can be used, which is not limited herein.
  • the second segmentation data may be searched according to the searching process of the first segmentation data described above.
  • the data other than the first segmentation data may also be configured as the second segmentation data by using a difference algorithm, and details are not described herein.
  • FIG. 5 is a block diagram illustrating an embodiment of a check system of a system start-up file according to the present disclosure.
  • the system includes a processor 51 and a storage 52 coupled to the processor 51.
  • the storage 52 is configured to store a system firmware file, a mapping table, and instructions executed by the processor 51, and the like.
  • mapping table includes first check data and addressing data associated with the first check data.
  • the addressing data includes a starting address and a data length, corresponding to the segmentation data.
  • mapping table is provided with a data type identifier associated with the first check data, or the first check data of the first type and the first check data of the second type are separately stored in different mapping tables.
  • the first check data of the first type and the first check data of the second type are separately stored continuously, and the first check data of the first type is set to be read prior to the first check data of the second type.
  • the processor 51 is configured to: acquire a system start-up file and a mapping table from the system firmware partition; read the first check data and the addressing data associated with the first check data from the mapping table; read the segmentation data corresponding to the first check data from the system start-up file; and determine whether the first check data is the first type or the second type. If the first check data is the first type, it is determined whether the segmentation data is a repeated permutation of the first check data, and if it is not the repeated permutation of the first check data a security error exists in the system start-up file.
  • first check data is the second type
  • second check data acquired through calculating the segmentation data according to a check algorithm
  • the processor 51 is configured to determine whether the first check data is the first type or the second type, according to the data type identifier or the mappi ng table from which the first check data is derived.
  • the check algorithm is a HASH algorithm.

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  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • General Physics & Mathematics (AREA)
  • Physics & Mathematics (AREA)
  • Software Systems (AREA)
  • Computer Hardware Design (AREA)
  • Quality & Reliability (AREA)
  • General Health & Medical Sciences (AREA)
  • Bioethics (AREA)
  • Health & Medical Sciences (AREA)
  • Information Retrieval, Db Structures And Fs Structures Therefor (AREA)
  • Stored Programmes (AREA)
  • Storage Device Security (AREA)
EP17871657.7A 2016-11-15 2017-10-10 Procédé de vérification et de compilation de fichiers de démarrage de système Active EP3543858B1 (fr)

Applications Claiming Priority (2)

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CN201611025231.3A CN106776105B (zh) 2016-11-15 2016-11-15 一种系统启动文件的校验及编译方法
PCT/CN2017/105432 WO2018090759A1 (fr) 2016-11-15 2017-10-10 Procédé de vérification et de compilation de fichiers de démarrage de système

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EP3543858A1 true EP3543858A1 (fr) 2019-09-25
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CN106776105B (zh) 2020-02-21
EP3543858A4 (fr) 2019-12-18
WO2018090759A1 (fr) 2018-05-24
US20190163606A1 (en) 2019-05-30
CN106776105A (zh) 2017-05-31
EP3543858B1 (fr) 2021-12-01
US11061803B2 (en) 2021-07-13

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